Question

The lUPAC name of an element with atomic number 119 is

• A. ununennium
• B. unnilennium
• C. unununnium
• D. ununoctium

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
IUPAC naming for elements with \(Z>100\) follows a systematic set of roots for each digit:
0 = nil, 1 = un, 2 = bi, 3 = tri, 4 = quad, 5 = pent, 6 = hex, 7 = sept, 8 = oct, 9 = enn.
The suffix "-ium" is added to the combined roots.
Step 2: Detailed Explanation:
Atomic Number = 119.
1. The first digit '1' corresponds to the root "un".
2. The second digit '1' corresponds to the root "un".
3. The third digit '9' corresponds to the root "enn".
Combining these: un + un + enn = ununenn.
Adding the suffix: ununenn + ium = ununennium.
The temporary symbol is Uue.
Step 3: Final Answer:
The correct IUPAC name for element 119 is ununennium.